COVER - USD ($) shares in Millions, $ in Millions	12 Months Ended
	Jun. 29, 2024	Aug. 14, 2024	Dec. 30, 2023
Cover [Abstract]
Document Type	10-K
Document Annual Report	true
Document Period End Date	Jun. 29, 2024
Current Fiscal Year End Date	--06-29
Document Transition Report	false
Entity File Number	001-36861
Entity Registrant Name	Lumentum Holdings Inc.
Entity Incorporation, State	DE
Entity Tax Identification Number	47-3108385
Entity Address, Street	1001 Ridder Park Drive
Entity Address, City	San Jose
Entity Address, State	CA
Entity Address, Postal Zip Code	95131
City Area Code	408
Local Phone Number	546-5483
Title of each class	Common Stock, par value of $0.001 per share
Trading Symbol(s)	LITE
Name of exchange on which registered	NASDAQ
Entity Well-known Seasoned Issuer	Yes
Entity Voluntary Filers	No
Entity Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Entity Filer Category	Large Accelerated Filer
Entity Small Business	false
Entity Emerging Growth Company	false
ICFR Auditor Attestation Flag	true
Document Financial Statement Error Correction	false
Entity Shell Company	false
Entity Public Float			$ 2,152
Entity Common Stock, Shares Outstanding		68.0
Documents Incorporated by Reference	Portions of the information called for by Part III of this Annual Report on Form 10-K are hereby incorporated by reference from the definitive proxy statement for the registrant’s annual meeting of stockholders, which will be filed with the Securities and Exchange Commission not later than 120 days after the registrant’s fiscal year ended June 29, 2024.
Entity Central Index Key	0001633978
Amendment Flag	false
Document Fiscal Year Focus	2024
Document Fiscal Period Focus	FY